Measures of Concentration and Stability: Two Pedagogical Tools for Industrial Organization Courses

Abstract

This document describes two pedagogical tools developed for teaching applied microeconomics, specifically the issues related to concentration, dominance, stability and asymmetry of firms. The tools make a compilation of several concentration and stability indexes used in the literature since 1945. Among the benefits of the applications are the ease and agility to perform comparative analyzes of intersectorial and/or intertemporal type in a simple and agile way; and the use of unconventional concentration and stability measures.

Web Platform for the Identification and Analysis of Events on Twitter

“…Recently, several research groups are interested in this issue [4] and have been given the task of developing systems focused on the analysis of opinions generated on Twitter. In this context, RELATIN emerges as an international forum in which different automatic systems are proposed and evaluated focused on the analysis of online reputation, specifically on the information produced in Twitter [5].…”

“…Until now, the different groups that have participated in RELATIN focus on developing automatic methods for tasks such as: (i) selection of relevant tweets for an entity [5], (ii) identification of negative, positive or neutral implications toward an entity [6], (iii) grouping of opinions by similar topic [7], and (iv) identification of opinion leaders within a community [8]. However, the problem of how to show the result of the automatic analysis to an ORA in a way that facilitates decision-making has been little explored.…”